Film star and producer George Clooney and his wife, human-rights attorney Amal Alamuddin Clooney, are donating $500,000 to help survivors of the Feb. 14 Florida high-school shooting massacre make their announced march on Washington to demand gun-safety regulation. The couple also said they will attend the protest.

“Amal and I are so inspired by the courage and eloquence of these young men and women from Stoneman Douglas High School,” Clooney, 56, said in a statement Tuesday. “Our family will be there on March 24 to stand side by side with this incredible generation of young people from all over the country, and in the name of our children Ella and Alexander, we’re donating $500,000 to help pay for this groundbreaking event. Our children’s lives depend on it.”

Oprah Winfrey also said she would match George and Amal Clooney’s $500,000 donation to the Florida students, The Associated Press reported. The media mogul tweeted from her verified account Tuesday night that the student organizers remind her of civil rights activists in the 1960s “who also said we’ve had ENOUGH and our voices will be heard.”

Director Steven Spielberg and wife Kate Capshaw earlier in the day joined the Clooneys in matching their $500,000 donation to help offset costs for the March of Our Lives event in Washington, D.C. Hollywood mogul Jeffrey Katzenberg and his wife, Marilyn, also matched the Clooneys’ donation, according to reports.

Following the Valentine’s Day shooting spree at the Parkland, Florida, high school, in which 15 students, a teacher and a football coach were killed, many surviving students have called for a march in Washington, and around the nation on Saturday, March 24. The March for Our Lives is intended to spur lawmakers to enact gun-control legislation, to help prevent similar shootings.

Students David Hogg, Alex Wind, Cameron Kasky, Jacqueline Coren and Emma Gonzalez — who made an impassioned speech at a rally in Fort Lauderdale where she shamed lawmakers for taking money from the NRA over the weekend — discussed their plans for the march on CBS’ Face the Nation.

“What we’re trying to do here ‘March For Our Lives’ is say, the adult politicians have been playing around while my generation has been losing our lives,” said Kasky, an 11th-grader at Marjory Stoneman Douglas.

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“At the end of the day, this isn’t a red and blue thing. This isn’t Democrats or Republicans. This is about everybody and how we are begging for our lives,” he added. “We need to make real change here and that’s exactly what we’re going to do.”